高比例电力电子电力系统稳定性的统一性判据研究(一):场站稳定判据  

Research on Unification Stability Criterion for the Power Electronics Dominated Power System(Ⅰ): Criterion of the Power-electronic Interfaced Plant

作　　者：孙华东 王一鸣 高磊 郭强 许涛 宋瑞华 李亚楼 贺静波 SUN Huadong;WANG Yiming;GAO Lei;GUO Qiang;XU Tao;SONG Ruihua;LI Yalou;HE Jingbo(China Electric Power Research Institute,Haidian District,Beijing 100192,China;State Key Lab of Control and Simulation of Power Systems and Generation Equipments(Department of Electrical Engineering,Tsinghua University),Haidian District,Beijing 100084,China;National Power Dispatching and Control Center,Xicheng District,Beijing 100031,China)

机构地区：[1]中国电力科学研究院有限公司,北京市海淀区100192 [2]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084 [3]国家电力调度控制中心,北京市西城区100031

出　　处：《中国电机工程学报》2022年第5期1713-1723,共11页Proceedings of the CSEE

基　　金：国家自然科学基金重点项目(U1766202)。

摘　　要：新版《电力系统安全稳定导则》明确提出“新能源场站短路比应达到合理水平”,但目前仍欠缺具体的评价方法和标准,无法有效量化电力电子电源集群接入交流电网的稳定程度。针对上述问题,提出一种面向电力电子电源场站稳定性分析的统一性稳定判据。首先,论述了动态统一性指标的定义和指标特性,并基于鲁棒控制理论和多变量频域控制理论提出并网系统的稳定性判据,实现了电磁尺度的稳定性风险精确度量;其次,在忽略电力电子电源、电网及其控制系统动态特性的条件下,将动态统一性指标退化为基于机电尺度相量模型的静态统一性指标,实现了高效率的稳定性风险初筛;再次,构造用于场站稳定性风险初筛和精确度量的两维统一性稳定指标,提升了场站稳定性评估的效率和准确率。最后,基于我国西北地区的案例验证表明,该文提出的统一性稳定判据可有效量化场站并网系统的安全稳定性。The new version of the “Code on security and stability for power system” states that the short circuit ratio(SCR) of renewable energy plants should reach a reasonable level. However, specific evaluation standards are insufficient,and it is impossible to quantify the stability of the power-electronic interfaced generators. To fill the gap, a unification stability criterion for the power system integrated with power-electronic interfaced plant was proposed in this paper. First of all, the definition and characteristic on unification stability index of dynamic state(USI1) were expressed, and the stability risk on the scale of electromagnetic simulation was measured, which based on robust control theory and multivariable frequency domain control theory. Secondly,ignoring the dynamic characteristics of renewable energy sources, power system and their control system, USI1 could be degenerated into unification stability index of static state(USI2) on the scale of electromechanical simulation to realize efficient risk scanning. Then, a dynamic two-dimensional index framework was constructed to improve the efficiency and accuracy of plant stability assessment. Finally, the case, which based on the power electronics dominated power system in the Northwest of China verified the effectiveness of the proposed method.

关 键 词：高比例电力电子电力系统 稳定性分析 统一性稳定判据 鲁棒控制理论 多变量频域控制理论 

分 类 号：TM712[电气工程—电力系统及自动化]